Underground power utility
vault Manhole fires &
explosions are becoming
commonplace in major cities
with aging underground
infrastructures. The problem
is a build up of gases that
cause manhole fires and
explosions…..
vault Manhole fires &
explosions are becoming
commonplace in major cities
with aging underground
infrastructures. The problem
is a build up of gases that
cause manhole fires and
explosions…..
POTENTIAL SOURCES OF
EXPLOSIVE GASES :
• Thermal decomposition of cable
insulation resulting from electric
arcing or I2R heat: methane, ethylene,
acetylene, carbon monoxide
• Hydrolysis of water due to arcing
with carbon present: hydrogen,
carbon monoxide, methane
(secondary)
• Pipeline leaks of natural gas:
methane, ethane
• Leaks of sewer gas: methane,
ethane
• Leaks from underground storage
tanks: gasoline vapors
COMBUSTIBLE GAS MIXTURES :
• Gases like hydrogen, carbon
monoxide, methane/ethane, and
other hydrocarbons will form mixtures
that can reach concentrations equal
or above the LEL. (lower explosive
limit)
• Ignition will occur at the proper
combination of oxygen with the
combustible gases and high
temperature or when an ignition
source is provided.
EXPLOSIVE GASES :
• Thermal decomposition of cable
insulation resulting from electric
arcing or I2R heat: methane, ethylene,
acetylene, carbon monoxide
• Hydrolysis of water due to arcing
with carbon present: hydrogen,
carbon monoxide, methane
(secondary)
• Pipeline leaks of natural gas:
methane, ethane
• Leaks of sewer gas: methane,
ethane
• Leaks from underground storage
tanks: gasoline vapors
COMBUSTIBLE GAS MIXTURES :
• Gases like hydrogen, carbon
monoxide, methane/ethane, and
other hydrocarbons will form mixtures
that can reach concentrations equal
or above the LEL. (lower explosive
limit)
• Ignition will occur at the proper
combination of oxygen with the
combustible gases and high
temperature or when an ignition
source is provided.
TECHNICAL DATA
Model NW521-EX
Power output 3 hp (.8 kW)
Phase 1 ph
Frequency 60 Hz
Speed 3300 RPM
Voltage 115 volts
Full load amps Single ph.
12
Weight with cables 48 lbs
Discharge size 2”
Solid size 3/8”
Model NW521-EX
Power output 3 hp (.8 kW)
Phase 1 ph
Frequency 60 Hz
Speed 3300 RPM
Voltage 115 volts
Full load amps Single ph.
12
Weight with cables 48 lbs
Discharge size 2”
Solid size 3/8”
ELECTRICAL DATA
Motor type Enclosed
submersible – IP 68
Motor design - NEMA type N
Insulation Class F
Max. stator temp. 155º C
Max. ambient temp. 72º C
Service factor 1.8
Voltage tolerance ± 10
Motor type Enclosed
submersible – IP 68
Motor design - NEMA type N
Insulation Class F
Max. stator temp. 155º C
Max. ambient temp. 72º C
Service factor 1.8
Voltage tolerance ± 10
| NUTMEG UTILITY PRODUCTS, INC. 1755 Highland Ave Cheshire CT 06410 |
| Nutmeg Utility Products, Inc. 1755 Highland Avenue, P.O. Box 723 Cheshire, CT 06410 Toll Free: 800-424-4246 Telephone: 203-272-2291 Fax : 203-272-1830 For your convenience we accept MasterCard and Visa. Women-Owned Business Enterprise Please direct technical comments or questions to: info@nutmegutility.com |
JOE NUTMEG’S NEW PUMP
Nutmeg Utility Products, Inc. has developed
a 115 volt single phase explosion proof
pump specifically for dewatering
manholes. This pump will not provide an
ignition source that may cause an
explosion in a manhole. This pump is
certified by MSHA (Mining Safety and Health
Administration) and D.O.E.R. (Pennsylvania
Department of Environmental Resources)
approved.
Applications include: gassy coal mines,
tunnels, manholes where explosion proof
pumps are required. Our new NW521-EX
is guaranteed to run dry.
Nutmeg Utility Products New Explosion
Proof Pumps are:
• Lightweight
• Guaranteed to run dry
Nutmeg Utility Products, Inc. has developed
a 115 volt single phase explosion proof
pump specifically for dewatering
manholes. This pump will not provide an
ignition source that may cause an
explosion in a manhole. This pump is
certified by MSHA (Mining Safety and Health
Administration) and D.O.E.R. (Pennsylvania
Department of Environmental Resources)
approved.
Applications include: gassy coal mines,
tunnels, manholes where explosion proof
pumps are required. Our new NW521-EX
is guaranteed to run dry.
Nutmeg Utility Products New Explosion
Proof Pumps are:
• Lightweight
• Guaranteed to run dry
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